| Ranking suspected answers to natural language questions using predictive annotation Dragomir R. Radev (University of Michigan), John Prager (IBM TJ Watson Research Center), Valerie Samn (Teachers College | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Rate optimal multiple testing procedure in high-dimensional regression Pengsheng Ji, Zhigen Zhao | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Rate Region of MIMO RIS-assisted Broadcast Channels with Rate Splitting and Improper Signaling Mohammad Soleymani, Ignacio Santamaria, Eduard Jorswieck | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Rational elements in representations of simple algebraic groups, I Alexandre Zalesski | L4–5 Advanced | CC0-1.0 | mirrored | 18 pp. | arxiv |
| Rational homology disk smoothings and Lefschetz fibrations Hakho Choi | L4–5 Advanced | CC-BY | mirrored | 25 pp. | arxiv |
| Rationality, Cooperation and Conversational Implicature Mark Lee (University of Sheffield) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Rational tensegrities through the lens of toric geometry Fatemeh Mohammadi, Xian Wu | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Reaction-diffusion processes and their connection with integrable quantum spin chains Malte Henkel | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Reactive Global Minimum Variance Portfolios with $k-$BAHC covariance cleaning Christian Bongiorno, Damien Challet | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Reactive Stepping for Humanoid Robots using Reinforcement Learning: Application to Standing Push Recovery on the Exoskeleton Atalante Alexis Duburcq, Fabian Schramm, Guilhem Bo\'eris | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Real Algebraic Surfaces J\'anos Koll\'ar | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Real Algebraic Threefolds II: Minimal Model Program J\'anos Koll\'ar | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Real Algebraic Threefolds I: Terminal Singularities J\'anos Koll\'ar | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| "Real Attackers Don't Compute Gradients": Bridging the Gap Between Adversarial ML Research and Practice Giovanni Apruzzese, Hyrum S. Anderson, Savino Dambra | L4–5 Advanced | CC-BY-NC-SA | mirrored | 26 pp. | arxiv |
| Real deformations and complex topology of plane curve singularities Norbert A'Campo | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Real Estate Career Introduction Regina Pierce-Brown, Crystal Barry, Joseph Chavez | L1–3 Foundational | CC-BY-NC-ND | mirrored | 418 pp. | libretexts |
| Real GDP per capita in developed countries Ivan O. Kitov | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Realizations of inner automorphisms of order four and fixed points subgroups by them on the connected compact exceptional Lie group $E_8$, Part III Toshikazu Miyashita | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Real Options Technique as a Tool of Strategic Risk Management Volodymyr Savchuk | L4–5 Advanced | CC-BY-NC-SA | mirrored | 22 pp. | arxiv |
| Real payoffs and virtual trading in agent based market models F.F. Ferreira, M. Marsili | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Real roots of random orthogonal polynomials with exponential weights Yen Do, Doron Lubinsky, Hoi H. Nguyen | L4–5 Advanced | CC-BY | mirrored | 40 pp. | arxiv |
| Reason in Common Sense | L2–5 Introductory | Public domain | mirrored | 296 pp. | wikisource |
| Reasoning with Axioms: Theory and Pratice Ian Horrocks, Stephan Tobies | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Reasoning with Higher-Order Abstract Syntax in a Logical Framework Raymond C. McDowell, Dale A. Miller | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Reasoning with Individuals for the Description Logic SHIQ Ian Horrock, Ulrike Sattler, Stephan Tobies | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Recent Advances in Reinforcement Learning in Finance Ben Hambly, Renyuan Xu, Huining Yang | L4–5 Advanced | CC-BY-NC-ND | mirrored | 65 pp. | arxiv |
| Recent Results on No-Free-Lunch Theorems for Optimization Christian Igel, Marc Toussaint | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Recognition Performance of a Structured Language Model Ciprian Chelba, Frederick Jelinek (CLSP The Johns Hopkins University) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Recognizing Syntactic Errors in the Writing of Second Language Learners David A. Schneider, Kathleen F. McCoy (University of Delaware) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Reconstructing the thermal Green functions at real times from those at imaginary times G. Cuniberti, E. De Micheli, G. A. Viano | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Recurrent Convolutional Neural Networks Learn Succinct Learning Algorithms Surbhi Goel, Sham Kakade, Adam Tauman Kalai | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Red Seal Landscape Horticulturist Identify Plants and Plant Requirements I (Nakano) Michelle Nakano | L1–3 Foundational | CC-BY | mirrored | 52 pp. | libretexts |
| Reducing Certified Regression to Certified Classification for General Poisoning Attacks Zayd Hammoudeh, Daniel Lowd | L4–5 Advanced | CC-BY | mirrored | 52 pp. | arxiv |
| Reducing Polarization on Abortion, Guns and Immigration: An Experimental Study Michele Belot, Guglielmo Briscese | L4–5 Advanced | CC-BY | mirrored | 38 pp. | arxiv |
| Reduction of Intermediate Alphabets in Finite-State Transducer Cascades Andre Kempe | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Reevaluating the Taylor Rule with Machine Learning Alper Deniz Karakas | L4–5 Advanced | CC-BY-NC-SA | mirrored | 23 pp. | arxiv |
| Refined universality for critical KCM: lower bounds Ivailo Hartarsky, Laure Mar\^ech\'e | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Refinement of a Structured Language Model Ciprian Chelba, Frederick Jelinek (CLSP The Johns Hopkins University) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Refinement of Bethe ansatz string and its alternative Anjan Kundu | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Refinements of asymptotics at zero of Brownian self-intersection local times A. A. Dorogovtsev (Institute of Mathematics, National Academy of Sciences of Ukraine), N. Salhi (Preparatory Institute for Engineering Studies of Nabeul | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Reflected backward stochastic differential equations and a class of non linear dynamic pricing rule Marie-Amelie Morlais | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Re-formulating the Einstein equations for stable numerical simulations: Formulation Problem in Numerical Relativity Hisa-aki Shinkai, Gen Yoneda | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| REFUGE2 Challenge: A Treasure Trove for Multi-Dimension Analysis and Evaluation in Glaucoma Screening Huihui Fang, Fei Li, Junde Wu | L4–5 Advanced | CC-BY-NC-ND | mirrored | 29 pp. | arxiv |
| Regime-switching affine term structures Andreas Celary (1), Paul Eisenberg (1), Zehra Eksi (1) ((1) Institute for Statistics | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Regional Pooling in Extreme Event Attribution Studies: an Approach Based on Multiple Statistical Testing Leandra Zanger, Axel B\"ucher, Frank Kreienkamp | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Reinforcement Learning for Economic Policy: A New Frontier? Callum Rhys Tilbury | L4–5 Advanced | CC-BY | mirrored | 12 pp. | arxiv |
| Reinforcement Learning for Joint Optimization of Multiple Rewards Mridul Agarwal, Vaneet Aggarwal | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Reinforcement learning in market games Edward W. Piotrowski, Jan Sladkowski, Anna Szczypinska | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Relational Message Passing for Fully Inductive Knowledge Graph Completion Yuxia Geng, Jiaoyan Chen, Jeff Z. Pan | L4–5 Advanced | CC-BY | mirrored | 13 pp. | arxiv |
| Relationship between inflation, unemployment and labor force change rate in France: cointegration test Ivan O. Kitov, Oleg I. Kitov, Svetlana A. Dolinskaya | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |